Chapter 2 Test Honors

The ____ is positively charged, whereas the ___ is negatively charged.

• 1. neutron, electron

• 1. electron, neutron

• proton, electron

• proton, neutron

A mystery solution had a pH of 4.5 on the pH scale. Which is true?

• 1. There are absolutely no hydrogen ions in that solution, which makes it more basic.

• 1. There are more hydrogen ions in that solution, which makes it more acidic.

• 1. There are more hydroxide ions in that solution, which makes it more acidic.

• 1. There are less hydrogen ions in that solution, which  makes it more neutral.

Which type of bonds hold two or more water molecules together?

• 1. hydrogen bonds

• 1. covalent bonds

• ionic bonds

• Van der Waals

Which two particles make up the nucleus of an atom?

• protons and electrons
• protons and neutrons
• molecules and compounds
• neutrons and electrons

How many valence electrons does this picture show?

• 4
• 5
• 6
• 3

Nucleic acids include ___ and ___.

• DNA and RNA

• Nonmetal and Metal

• Covalent and Ionic

• None

What is a substance called if it speeds up a chemical reaction?

• reusable
• catalyst
• specific
• fragile

A compound made of carbon, hydrogen, and oxygen atom; major source of short term energy for the human

• lipid

• protein

• carbohydrate

• enzyme

The atomic number is equal to

• The number of protons

• The number of neutrons

• The number of electrons

• The number of protons plus neutrons

Forms of an element with different numbers of neutrons

• Atom

• Molecule

• Isotope

• Ions